P&A Mud Containment System.

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Plug and abandonment doesn’t need a rig.

Page last modified
July 4 2025

Rethinking P&A: Meet the Mud Containment System (MCS)

Plug and abandonment doesn’t need a rig.
It doesn’t need a riser.
And it doesn’t need to risk environmental impact.

The Plexus Mud Containment System (MCS) is a purpose-built solution for riserless abandonment of wells that do not have any wellhead in place, and have instead been suspended with a Mudline Suspension System (MLS), with MCS enabling full recovery of oil-based mud and safe removal of TA caps from a vessel.

What sets MCS apart:
• No jack-up required
• Precise environmental barrier placement
• Compact, pressure-safe, and easily deployed
• Zero-spill OBM containment
• Fast mobilisation in rental-ready frame

Successfully used across a number of suspended wells, MCS delivers a cleaner, smarter, and more cost-effective path to decommissioning.
Smaller footprint. Bigger impact!

Pros & Limitations
1
Can be permanent or multi-release
1
Weld quality connection
1
Safe & efficient way to get back onto old wells
1
Fast connection means operation times are reduced
0
Pre-job planning would be required.
Specification
Title Description
Theme/Discipline
Well OperationsWell Plug and AbandonmentAbandonment & Decommissioning
Core Tech
Hardware Tool
Can reconnect to bare conductor pipe (or other damaged profiles)
Even if pipe is damaged, the design of POS-GRIP to seal onto the pipe means that if the conductor is damaged, corroded or not oval then connector can still connect and achieve a weld tight seal.
Multi-Releasable version available
The releasable version of this connector can be used easily in Multi-well campaigns
Various sizes available
Different sizes available to connect to various different pipe sizes

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Technology Readiness Level

The Technology Readiness Level (TRL) indicates the maturity level of novel technologies. Learn more about the TRL scale used by us.

[9/9]

Development Technology demonstration Mature / Proven
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Plexus specialises in the design and supply of wellhead products to the global oil and gas industry. We believe innovative technology needs to work hand in hand with outstanding service. We do what it takes to deliver wellhead equipment which is safer, and is proven to save time and money. Operating in more than 20 locations, with four global offices, we have the capability and capacity to deliver and install our wellhead systems in any location worldwide.

Contact: +44 (0) 1224 774 222
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